For areas not connected to the grid. Clients that want to be independent of the grid. Good for remote locations.
a). Domestic
These are systems designed for homes and private residentials.
b). Commercial
These are provided for rental apartments or small-scale businesses in townsS or in the rural areas.
c). Industrial
These are standalone PV systems that are designed to handle small industries that are located away from the grid or when power is urgently required but the grid is unavailable. Usually, a large battery bank is connected through a charge controller to the solar PV array. The power from the PV array is then passed through an inverter into the load side of the installation.
Grid-tie systems are quickly cutting costs for our Commercial and Industrial clients. These solutions are also suitable for domestic and residential clients who take advantage of the sun’s availability during the day to cut energy costs.
a). Domestic
Grid-tied domestic systems are small systems used by home owners and private residentials to bring down the monthly energy bills by utilizing solar power during the day.
b). Commercial
Grid-tied solar power systems are very beneficial to business and other commercial installations as they cut down energy bills by utilizing solar power during the day
c). Industrial
Industries are greatly advantaged by using grid connected system to cut down their daytime energy costs.
Combines the capabilities of solar PV and battery storage. Can also add other sources of power including the grid and backup generators.
Water pumping for boreholes, wells, farm irrigation and in domestic and residential buildings.
No reason to spend money on energy bills while heating water. We can use solar water heating solutions to offset these energy costs.
- Low cost of electricity from the Solar Grid Tie PV system of US$ 0.020 per kWh
- Huge cumulative electricity cost savings of over the lifetime of the system
- Hedge against possible future escalations in grid electricity price,
- 100% Investment Deduction Allowance (IDA) is available for investment in solar power plants providing additional savings from tax and improving the project financial outlook.
- Potential additional savings resulting from reduction in maximum demand charges if the facility electricity peak demand occurs during the day time.
- Reduced carbon footprint over the project lifetime in the business by utilizing electrical energy from renewable sources.
Back-up kits are essential when power outage stops the running of a business. It is necessary to have a reliable power back up source.
During the day, solar lights will absorb and store the PV energy from the sun and store that for usage during the night providing a total lighting solution.
STEMA grid-tie project proposal will cover the following;
Engineering Services
- Preliminary design
- Detailed plant design and drawings
- Array design and layout
- DC:AC Ratio sizing
- Mounting system
- AC/DC system design
Equipment Supply
- Modules
- Module mounting structure, clips and fasteners
- Inverter(s)
- DC and AC cables
- AC collection/integration switchgear
- Weather station (when needed)
- Export limiter
System Installation
- Module mounting structure
- Module installation
- Inverter installation
- DC wiring and AC wiring
- Installation of AC integration board
- Power station earthing
System commissioning
- Testing and commissioning the connection to the clients electricity system
Training and technical documentation
- Training of the client’s operators on basic technical operation and maintenance requirements of the solar plant.
- Tool box training sessions on management of health and safety specific to PV plants
- Provision of drawings and technical manual and data sheets for the installed equipment.
Exclusions
The following activities is the developer’s responsibility and will not form part of STEMA scope:
- Land identification and acquisition
- Statutory approvals for site development
- Site development surveys including geological studies, topographic/boundary survey etc. if required
- Site preparation including clearing, levelling and grading if required
- Site civils e.g. drainage, boundary
- Site services e.g. lighting, communication facilities and network, lightning arrestors if require.
- Interface connection to Customer distribution board
Warranty
The hardware warranties will be in line with the equipment warranties stated by the manufacturers as appended to all proposals
A workmanship warranty of ten years from the date of installation will be provided in addition to hardware warranty.
In addition to the warranties, STEMA will offer a performance guarantee of 1.5kWh/kWp for ten years (at STC). This is contingent on STEMA taking up the operations and maintenance of the PV plant at a cost of USD $ 0.02 per installed watt.